Ore-concentrator.



PATBNTED JULY 9, 1907,

G. A. GHRISTENSEN.

ORE GONGENTRATOR.

APPLICATION FILED MAY 10,1906.

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PATBNTBD JULY 9, 1907.

C. A. GHRISTENSEN. ORE GONGENTRATOR.

APPLIOATION FILED In 10,1906.

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PATENT oEEieE.

CHRIS'IOFFER A. OI-IRISTENSEN, OF ORETOWN, OREGON.

ORE-GONCENTRATOR.

Specification of Letters Patent.

Patented July 9, 1907.

Application iiled May 10,1906. Serial No. 316,171.

To all whom it may concern:

Be it known that I, CHmsToEFER A. CHRIs'rENsEN, a citizen of the United States, residing at Oretown, in th e county of Tillamook and State of Oregon, have invented certain new and useful Improvements in Ore- Gonccntrators; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to improvements in ore concentrators.

The object of the invention is to provide a concentrator having means whereby the riffles at one end of the table may be elevated.

Another object is to provide a concentrator having an improved operating mechanism and means whereby the stroke of`said operating mechanism may be adjusted.

With the above arid oth er objects in view, the invention consists of certain novel features of construction, combination and arrangement of parts, as will be hereinafter described and claimed.

In the accompanying drawingsz-Figure l is a plan view of a concentrator constructed in accordance with the invention; Fig. 2 is a side view; Fig. 3 is an end view of the front end of the concentrator, Fig. 4 is a vertical, cross, sectional view through the rear end of the table and riffles; Fig. 5 is a vertical, longitudinal sectional view through the table and its supporting frame on the line 5-5 of Fig. l; and Fig. 6 is a plan view of a part of the table at one end of the machine, the riffles being removed and parts broken away.

Referring more particularly to the drawings, l denotes the supporting frame having arranged thereon a centrally-disposed, longitudinal supporting bar or beam 2, on which adjacent to its opposite ends are arranged pairs of open bearings 3, in which are slidably mounted supporting rods or shafts 4, on which are pivotally mountedv bearing lugs 5, t0 which are secured the concentrating table 6, which consists of a frame formed of longitudinal bars 7 connected by a series of cross bars 8.

In the frame work of the table is arranged a centrally disposed bumper bar 9, on the lower side of which is secured a bumper l0 adapted to strike a similar bumper l2 secured to the central supporting bar 2 of the frame l. On the framework of the table is arranged a series of longitudinally disposed riffles I3, which extend from one end to the other of the table, as shown. The inner ends of the riffles are secured to the main frame of the'table, while the outer ends of the rif'lles are secured to short supporting bars I4 arranged at the outer' end of the table frame, said bars being pivotally mounted at their inner ends upon a transversely disposed rod l5, whereby the same may be raised or lowered. Secured to the under side of y bracket 3l.

the front end of the frame is a transversely disposed plate 16, in the inner edge of which is formed a series of recesses 17, in each of which is arranged an adjusting screw I8. These screws have on their lower ends hand wheels I9 by means of which they may be turned. The screws are further provided with IiXed collars 20 adapted to engage the opposite sides of the plate 1G, thereby holding the screws in place on said l plates to permit the same to be turned in the recesses I7.

The upper threaded ends of the screws l5 are adapted to work through threaded apertures formed in the lower side of the iron bands 2l which are arranged on the outer end of eachof the short bars 14, as shown. By connecting theouter ends of the bars 14 with the adjusting screws 18, the outer ends of said bars may be raised or lowered on the rod l5 to any desired degree, thereby raising the riffles at this end of the table. By raising the ends of the bars 14 at different elevations across the end of the table a gradual rise of the rifl'les from one side of the table t0 the other may be had, thereby providing for the separation of the concentrates according to their difference in specific gravity, as only the heavier minerals will go up to thehigh portions of the riffles while the light minerals will pass along the ril'Iles at the lower elevation, thereby grading the concentrates while the same are passing over the table, the adjustment of the rill'les as above described being clearly shown in Fig. 4 of the drawings, it being understood^ that the rifles are formed of a exiblematerial which will permit them to be sprung or forced upwardly by the bars 14 and the adjusting screws I8, as hereinbefore described.

The red or shaft 4 Vat the forward end of the concentrator is preferably threaded for a suitable distance, and on said threaded end is adapted to be screwed a stop nut 22, said nut being adapted to be screwed in one direction or the other to adjust the stroke of the shaft or rod 4 when the same is operated to move the table. Connected to the outer end of the rod or shaft 4 is a downwardly curved yoke 23, in which is journaled a bearing roller 24, against which is adapted to work an Operating cam 25 which is fixed upon a transversely disposed shaft 26 journaled in bearings- 27 on the front end of the frame l. Said shaft has mounted thereon drive pulleys 28, by means of which power may be applied to the shaft to turn the same and the cam 25. Secured to the outer end of the yoke 23 is a guide rod 29, the outer end of which is slidably-mounted in a bearing 30 arranged on the outer end of a supporting The guide rod 29 is threaded for a portion of its length and on said threaded portion is adapted to be screwed an adjusting nut 32, between which and the inner end of the bearing 30 is arranged a coil spring 33, against the tension of which the cam 25 forces the yoke and the rod or shaft 4 carrying the table. The cam 25 is adapted to move the table in one direction while the spring 33 throws the table back as soon as the cam has passed the roller 24 in the yoke 23, as will be understood. The tension of the spring 33 may be adjusted by the nut 32 on the guide rod 29. When the table is thrown back by the spring 33, the bumper arranged thereon will be brought into forcible engagement with the bumper l2, thereby throwing the material along the riflles on the table. The bumpers l0 and l2 are so disposed on thc frame and table that when the stop nut 22 is screwed up to` its fullest extent they I barely come in contact thereby givingonly a slight shake or jar to the table and as the nut is unscrewed the throw becomes longer and the force with which the bumpers come in contact is correspondingly greater as is also the jar or shake of the table.

Arranged beneath one side of the table and preferably midway between the ends of the same is a tilting device 34, which is here shown as preferably consisting of a pair of threaded rods 35, the upper end of the upper rod being pivotally connected to the under side of the table by means of a bracket 36 while the lower end of theV lower rod is pivotally connected to the floor by means of a bracket 37. On the threaded inner ends of the rods 35 is arranged a turn buckle 38, by means of which, when turned in one direction or the other, the table may be rocked or tilted to any desired angle in the bearings 3 and supporting frame.

From the foregoing description, taken in connection with the accompanying drawings, the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form7 proportion and the minor details of construction may be resorted to without departing from the principle or sacrificing any oi' the advantages of this invention, as defined by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by Letters-Patent, is:-

1. In an ore concentrator, the combination of a supporting frame, a table pivotally and slidably mounted thereon, longitudinally disposed riilles arranged on said table, a plurality of pivotally mounted elevating bars arranged beneath said riilles at one end of the table, adjusting screws adapted to engage and elevate one end of said bars and the riilles thereon to elevate the latter .in dierent planes relatively to each other, and means for operating said table.

2. In an ore concentrator, the combination with a supporting frame, of a table pivotally and slidably mounted thereon, riiiles arranged on said table and extending longitudinally from one end to the other thereof, a transversely-disposed pivot rod arranged near one end of the table frame, elevating bars pivotally mounted on their inner ends on said bars, a bearing plate arranged across the under side of said end of the table, bands arranged on the ends of .said elevating bars, said bands having in their lower sides threaded apertures, and adjusting screws in said bearing plate adapted to engage the threaded apertures in said bands, whereby when said screws are turned in the proper direction, said bars and the rilles above the` same will be elevated, substantially as described.

3. In an ore separator, the combination with a supporting frame having a centrally-disposed supporting bar or beam, of open bearings arranged thereon, supporting shafts or bars arranged in said bearings, supporting lugs pivotally mounted on said rods or shafts, a table arranged on said lugs, rilles arranged on and extending longitudinally from one end to the other of said table, means for elevating one end of said riflies in a gradual rise from one side of the table to the other, a yoke arranged on the outer end of one of said supporting bars or shafts, a drive shaft mounted on the forward end of said supporting frame, a cam arranged on said shaft to engage said yoke and move said supporting rod and table in one direction, and a spring adapted to throw said table back in the opposite direction, substantially as described.

4. In an ore coneentrator, the combination with a supporting'frame having open bearings arranged at each end thereof, supporting rods or shafts slidably mounted in said bearings, a table pivotally mounted on said shaft, a yoke secured to the Outer end of one of said operating shafts, a bearing roller journaled in said yoke, a guide rod connected to the outer end of the latter, a drive shaft journaled on said supporting frame, a cam arranged on said shaft to engage the bearing roller in said yoke to move the table in one direction, a spring arranged on said guide rod to throw said table back in the opposite direction, an adjusting nut to regulate the tension of said spring, an adjusting nut arranged on said supporting rod or shaft to limit the stroke thereof and regulate the force of the shake given to the table, bumpers arranged on said table and its supporting frame, threaded tilting rods CHRISTOFFER A. CHRISTENSEN.

Witnesses Crus. P. NELSON, CHAs.' RAY. 

